更多"Man can go on increasing his number"的相关试题:
[单项选择]Man can go on increasing his numbers at the present rate. In the next 30 years man will face a period of crisis. Some experts believe that there will be a widespread food shortage. Other experts think that this is too pessimistic, and that man can prevent things from getting worse than they are now. But remember that two-thirds of the people in the world are under-nourished or starving now.
One thing that man can do is to limit the number of babies born. The need for this is ob- vious, but it is not easy to achieve. People have to be persuaded to limit their families. ’In the countries of the population explosion, many people like big families. The parents think that this brings a bigger income for the family and ensures there will be someone in the family who will look after them in old age.
Several governments have adopted birth control policies in recent years. Among them are Japan, China, India and Egypt. In some cases the results have not been successful. Japan has been
A. people need big families
B. people are short of money
C. people can get more pleasure from more children
D. people are afraid of old age
[单项选择]Hypnosis
1 Increasing numbers of American doctors are using a technique known as hypnosis. They say hypnosis often can help persons suffering pain and stress. It also can help speed the healing of burns and treats some forms of asthma and some skin diseases. Hypnosis is not new. It has been used for many years both in scientific research and to please crowds at public gatherings.
2 Hypnosis is commonly described as a condition similar to sleep. But, experts say it is more a form of deep thought. The thought becomes so intense that it is no longer just a thought. To the person, it becomes reality.
3 Hypnotized patients are reported to have increased self-control and a reduced sense of pain. Some doctors use hypnosis to limit pain during a medical operation. Hypnosis is used mainly when the patient may have problems with usual anesthetic or pain-killing drugs.
4 Experts say there is little chance that a patient will awaken during such an operation. But, if this happens, the o
A. hypnosis can reduce or end a patient’s pain.
B. Why hypnosis is not effective in treating cigarette smokers and some other illness.
C. Hypnosis can treat burn victims.
D. The definition of hypnosis
E. The function of hypnosis
F. The importance of hypnosis oppose
[填空题]Increasing numbers of farmers are growing genetically engineered crops. A new report also says that the total land area where such crops are grown is increasing.
Genetic engineering is the technology of changing the genes of living things. Genes are parts of {{U}} (36) {{/U}} that control {{U}} (37) {{/U}} and development. A changed gene directs a plant or other {{U}} (38) {{/U}} to do things it normally does not do. For example, a plant may be genetically engineered to {{U}} (39) {{/U}} insects.
There is plenty of {{U}} (40) {{/U}} information about genetically engineered crops. Critics of genetic engineering say the technology is a threat to human health and the environment.
The new report {{U}} (41) {{/U}} that farmers grew genetically engineered crops on more than 52 million hectares of farmland last year. That {{U}} (42) {{/U}} an increase in land area of 19 percent {{U}} (43) {{/U}} to the year before.
{{U}} (44) {{/U}}. Four countries grew 99 percent of
